... Molecular formula:C16H23N5O4 Molecular weight: 349.38494-Ethyl-4-hydroxy-1H-pyrano-[3',4':6,7]indolizino[1,2-b]quinoline ... ,12H)-dione; (+)-Camptothecin; Camptothecin, Camptotheca acuminata; 4-Ethyl-4-hydroxy-1H-pyrano-[3,4:6,7]indolizino[1,2-b]quinoline ...